Transmission Range Sensor Circuit Malfunction (PRNDL Input)
There's a problem with the gear selector position sensor signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The transmission range sensor tells the computer what gear the transmission is in. If this sensor isn't working right, it can't send the correct information, which messes with shifting.
What the computer is actually seeing
The powertrain control module (PCM) expects a certain voltage range based on the gear position. For example, in park, it should see around 5 volts; in drive, it might see 0.5 volts.
What a healthy reading looks like
Voltage should be between 0.5V (in gear) to 5.0V (park or neutral).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check transmission fluid level; should be at proper level and clean.
- 2Inspect wiring and connectors at the transmission range sensor for damage or corrosion.
- 3Measure voltage at the transmission range sensor; should be within 0.5V to 5.0V depending on gear position.
- 4If voltage is out of spec, replace the sensor. If not, check for issues further up the circuit, like internal module faults.
Common causes
- Faulty transmission range sensor
- Bad wiring or connectors to the sensor
- Corroded terminals
- Low transmission fluid level
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive, but shifting might be erratic, so fix soon.
Will this code come back after clearing?
Yes, if the underlying issue isn't fixed, it will return.
Why does this code pair with P0700?
P0700 is a general transmission fault code that indicates there's another issue with the transmission; they often show together.
Working a real vehicle right now?
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